Video games debate: Susan Greenfield and Tom Chivers
5 December 2011 Last updated at 14:15 GMT
Neuroscientist Baroness Greenfield claimed people who play a lot of video games can have an increase in "aggression and recklessness".
She is leading a debate in the House of Lords on Monday evening about the impact of digital technologies on the mind.
But The Daily Telegraph's science writer Tom Chivers said people can use screens and still talk to others, and research shows those with an active life in social media tend to have a more active "real life".